Rebase to latest GCC sources

.pc/closure-api-example-doc/doc/libffi.info

@@ -1,5 +1,5 @@
-This is ../libffi/doc/libffi.info, produced by makeinfo version 4.13
-from ../libffi/doc/libffi.texi.
+This is doc/libffi.info, produced by makeinfo version 4.12 from
+./doc/libffi.texi.
 
 This manual is for Libffi, a portable foreign-function interface
 library.
@@ -13,7 +13,7 @@ library.
      included in the section entitled "GNU General Public License".
 
 
-INFO-DIR-SECTION Development
+INFO-DIR-SECTION
 START-INFO-DIR-ENTRY
 * libffi: (libffi).             Portable foreign-function interface library.
 END-INFO-DIR-ENTRY
@@ -516,18 +516,18 @@ Index
 
 
 Tag Table:
-Node: Top700
-Node: Introduction1436
-Node: Using libffi3072
-Node: The Basics3507
-Node: Simple Example6114
-Node: Types7141
-Node: Primitive Types7424
-Node: Structures9244
-Node: Type Example10104
-Node: Multiple ABIs11327
-Node: The Closure API11698
-Node: Missing Features14618
-Node: Index15111
+Node: Top670
+Node: Introduction1406
+Node: Using libffi3042
+Node: The Basics3477
+Node: Simple Example6084
+Node: Types7111
+Node: Primitive Types7394
+Node: Structures9214
+Node: Type Example10074
+Node: Multiple ABIs11297
+Node: The Closure API11668
+Node: Missing Features14588
+Node: Index15081
 
 End Tag Table

.pc/closure-api-example-doc/doc/libffi.texi

@@ -437,7 +437,7 @@ require special allocation on platforms that have a non-executable
 heap.  Memory management for closures is handled by a pair of
 functions:
 
-@findex ffi_closure_alloca
+@findex ffi_closure_alloc
 @defun void *ffi_closure_alloc (size_t @var{size}, void **@var{code})
 Allocate a chunk of memory holding @var{size} bytes.  This returns a
 pointer to the writable address, and sets *@var{code} to the